<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #d1{
            width:100px;
            height: 100px;
            border: 1px solid red;
            /*margin-top: 100px;*/
            /*margin-bottom: 50px;*/
            /*margin-left: 100px;*/
            /*margin:200px;*/
            /*margin: auto auto;      */
            margin: 10px 20px 30px 40px;

        }
        #d2{
            width: 100px;
            height: 100px;
            border: 1px solid blue;
            margin-left: 50px;
            margin:200px;
        }
        #s1{
            margin-right: 50px;
        }
        #s2{
            margin-left: 50px;
        }
        #big{
            width: 200px;
            height: 200px;
            background-color: green;
            overflow: hidden;
        }
        #big>div{
            width: 50px;
            height: 50px;
            background-color: purple;
            margin-left: 50px;
            margin-top: 50px;
        }

    </style>
</head>
<body>
<div id="big"><div></div></div>
<span id="s1">span1</span><span id="s2">span2</span>
<div id="d1">d1</div>
<div id="d2">d2</div>
</body>
</html>